Removed Polymer elements depending on web-animations-js.

third_party/polymer/components/paper-menu-button/paper-menu-button-overlay.html

-<!--
-Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
-This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
-The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
-The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
-Code distributed by Google as part of the polymer project is also
-subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
--->
-
-<link rel="import" href="../polymer/polymer.html">
-<link rel="import" href="../core-overlay/core-overlay.html">
-
-<!--
-
-`paper-menu-button-overlay` is a helper class to position an overlay relative to another
-element, e.g. the button with a pulldown menu.
-
-@group Paper Elements
-@element paper-menu-button-overlay
-@extends core-overlay
-@homepage github.io
--->
-
-<polymer-element name="paper-menu-button-overlay" extends="core-overlay" attributes="relatedTarget halign valign">
-  <script>
-    Polymer('paper-menu-button-overlay', {
-
-      publish: {
-
-        /**
-         * The `relatedTarget` is an element used to position the overlay, for example a
-         * button the user taps to show a menu.
-         *
-         * @attribute relatedTarget
-         * @type Element
-         */
-        relatedTarget: null,
-
-        /**
-         * The horizontal alignment of the overlay relative to the `relatedTarget`.
-         *
-         * @attribute halign
-         * @type 'left'|'right'|'center'
-         * @default 'left'
-         */
-        halign: 'left'
-
-      },
-
-      updateTargetDimensions: function() {
-        this.super();
-
-        var t = this.target;
-        this.target.cachedSize = t.getBoundingClientRect();
-      },
-
-      positionTarget: function() {
-        if (this.relatedTarget) {
-
-          var rect = this.relatedTarget.getBoundingClientRect();
-
-          if (this.halign === 'left') {
-            this.target.style.left = rect.left + 'px';
-          } else if (this.halign === 'right') {
-            this.target.style.right = (window.innerWidth - rect.right) + 'px';
-          } else {
-            this.target.style.left = (rect.left - (rect.width - this.target.cachedSize.width) / 2) + 'px';
-          }
-
-          if (this.valign === 'top') {
-            this.target.style.top = rect.top + 'px';
-          } else if (this.valign === 'bottom') {
-            this.target.style.top = rect.bottom + 'px';
-          } else {
-            this.target.style.top = rect.top + 'px';
-          }
-
-          // this.target.style.top = rect.top + 'px';
-
-        } else {
-          this.super();
-        }
-      }
-
-    });
-  </script>
-</polymer-element>